1. whois
microsoft.com. 3600 IN TXT "v=spf1
include:_spf-a.microsoft.com
include:_spf-b.microsoft.com
include:_spf-c.microsoft.com
include:_spf-ssg-a.msft.net
include:spf-a.hotmail.com
include:_spf1-meo.microsoft.com -all"
2. history
_spf-a.microsoft.com. 2126 IN TXT "v=spf1 ip4:216.99.5.67 ip4:216.99.5.68 ip4:202.177.148.100 ip4:203.122.32.250 ip4:202.177.148.110 ip4:213.199.128.139 ip4:213.199.128.145 ip4:207.46.50.72 ip4:207.46.50.82 ip4:65.55.42.224/28 ip4:13.78.233.182 include:spf.protection.outlook.com ~all"
_spf-b.microsoft.com. 3600 IN TXT "v=spf1 include:_spf-mdm.microsoft.com ip4:207.46.22.35 ip4:207.46.22.98/29 ip4:217.77.141.52 ip4:217.77.141.59 ip4:203.32.4.25 ip4:23.103.224.0/19 ip4:206.191.224.0/19 ip4:65.52.80.137/32 ip4:51.140.75.55 ip4:13.70.32.43 ~all"
_spf-c.microsoft.com. 625 IN TXT "v=spf1 ip4:213.199.138.181 ip4:213.199.138.191 ip4:207.46.52.71 ip4:207.46.52.79 ip4:86.61.88.25 ip4:167.220.67.232/29 ip4:157.58.196.96/29 ip4:147.243.128.24 ip4:147.243.128.26 ip4:147.243.1.153 ip4:147.243.1.47 ip4:147.243.1.48 ip4:52.250.126.174 ~all"
_spf-ssg-a.msft.net. 3600 IN TXT "v=spf1 ip4:104.44.112.128/25 ip4:134.170.27.8
ip4:157.58.30.128/25
ip4:20.63.210.192/28
ip4:20.94.180.64/28
ip4:40.112.65.63 ip4:52.185.106.240/28 ip4:52.234.172.96/28 ip4:52.236.28.240/28 ip4:66.119.150.192/26 ~all"
_spf1-meo.microsoft.com. 3170 IN TXT "v=spf1 ip4:52.165.175.144 ip4:52.247.53.144 ip4:157.55.254.216 ip4:13.74.143.28 ip4:104.214.25.77 ip4:207.46.225.107 ip4:51.137.58.21 ip4:138.91.172.26 ip4:52.250.107.196 ip4:13.92.31.129 ip4:51.144.100.179 ip4:52.160.39.140 ip4:52.244.206.214 ip4:13.72." "50.45 ip4:20.118.139.208/30 ip4:20.98.194.68/30 ip4:20.83.222.104/30 ip4:20.88.157.184/30 ip4:20.59.80.4/30 ip4:20.51.6.32/30 ip4:20.97.34.220/30 ip4:20.107.239.64/30 ip4:20.105.209.76/30 ip4:20.98.148.156/30 ip4:20.69.8.108/30 ~all"
;include:spf-a.hotmail.com. IN TXT none (removed?)
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